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insulating hearth pour - Forno Bravo Forum: The Wood-Fired Oven Community

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I'm Peter Reinhart! Ask Me Anything! Monday, February 15, 2016 7:00-8:00 pm EST

To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

Ask Me Anything New Forum Feature

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
- Another thread will be posted for the live AMA. Registered users who are logged in during the live session can interact with the host by asking questions and receiving responses.
- The live thread will remain in the AMA forum to view after the session.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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insulating hearth pour

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  • insulating hearth pour

    Its been about ten days since I poured the structural hearth. Now finally my vermiculite has arrived. My question is with this 10 days inbetween the pours do I need to do anything to prep the set concrete of the strucural hearth. Also is it ok if I do half of insulating hearth pour today and the other half tomorrow. Any need to keep it damp after the insulating hearth pour is complete?
    thanks wayne
    see below for my oven album of progress to date

    http://picasaweb.google.com/wayneber...PizzaOvenWorld

  • #2
    Re: insulating hearth pour

    You shouldn't need any prep for the structural hearth. It's ok to split the vermiculite concrete poor but harder to achieve a truly level surface if you split it. It will help the insulating layer harden if you keep it damp several days.

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    • #3
      Re: insulating hearth pour

      When you mix your vermiculite concrete you will find that it will absorb a lot more water than other aggragates. I mixed mine by hand in a mortar tub, and just kept adding water until there was some dampness visible at the bottom of the tub. The wet portland will tend to sink to the bottom, being heavier, and this will provide good adhesion to your slab.

      Everyone, me included, thinks the stuff is wierd to work with. It won't achieve any kind of a finish. I just ended up patting it down with the trowel to get some sort of flatness on the surface, then keep it damp for a couple of days, but otherwise ignore it for a week. It does get rigid, if not rock-hard.

      The good news is that the tub of insulating concrete is light to lift unlike the rock-and-sand stuff.
      My geodesic oven project: part 1, part 2

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